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/*
* VBMouse - Interface to the Windows int 2Fh services
* Copyright (C) 2022 Javier S. Pedro
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef INT2FWIN_H
#define INT2FWIN_H
#include <stdbool.h>
#include <stdint.h>
#include <dos.h>
typedef void (__far *LPFN)(void);
enum int2f_functions
{
INT2F_NOTIFY_BACKGROUND_SWITCH = 0x4001,
INT2F_NOTIFY_FOREGROUND_SWITCH = 0x4002
};
static bool windows_386_enhanced_mode(void);
#pragma aux windows_386_enhanced_mode = \
"mov ax, 0x1600" \
"int 0x2F" \
"test al, 0x7F" /* return value is either 0x80 or 0x00 if win386 is not running */ \
"setnz al" \
__value [al] \
__modify [ax]
static inline void hook_int2f(LPFN *prev, LPFN new)
{
*prev = _dos_getvect(0x2F);
_dos_setvect(0x2F, new);
}
static inline void unhook_int2f(LPFN prev)
{
_dos_setvect(0x2F, prev);
}
#endif
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